| 01 | van der Zande / Bourdais / *Dixon / *Palou | Cadillac Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 02 | Bamber / Lynn / *Ericsson / *Magnussen | Cadillac Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 2 | Pilet / Imperatori / *Vanthoor / *Olsen | KCMG (HK) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 3 | Garcia / Taylor / *Catsburg | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R GTD | Chevrolet | GTD Pro |
| 4 | Milner / Sørensen / *Tandy | Corvette Racing (USA) | | Chevrolet | Corvette C8 | .R GTD | Chevrolet | GTD Pro |
| 5 | Vautier / Westbrook / *Duval / *Keating | JDC Miller MotorSports (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 6 | Kranz / Ori / *Castro / *Miller | Muehlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 7 | Kvamme / Doquin / *McCusker / *Estep | Forty7 Motorsports (USA) | | Duqueine | D08 | | Nissan | LMP3 |
| 8 | Farano / Deletraz / *Pinto de Andrade / *Habsburg | Tower Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 9 | Jaminet / Nasr / *Campbell | Pfaff Motorsports (CDN) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 10 | Taylor / Albuquerque / *Rossi / *Stevens | Konica Minolta Acura ARX-05 (USA) | Wayne Taylor | Acura | ARX-05 | | Acura | DPi |
| 11 | Thomas / Bomarito / *Pierson / *Tincknell | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 12 | Montecalvo / Bell / *Telitz / *Heistand | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD |
| 13 | Fidani / Wittmer / *Kern / *Bell | AWA (CDN) | Andrew Wojteczko | Duqueine | D08 | | Nissan | LMP3 |
| 14 | Barnicoat / Kirkwood / *Hawksworth | VasserSullivan (USA) | | Lexus | RC F | GT3 | Lexus | GTD Pro |
| 15 | Müller / Cindric / *Assenheimer | Proton USA (D) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD Pro |
| 16 | Hardwick / Heylen / *Robichon / *Lietz | Wright Motorsports (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 18 | Merriman / Chatin / *Tilley / *Dalziel | Era Motorsport (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 19 | Megrue / Segal / *Sweedler / *Altoè | TR3 Racing (USA) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 20 | Andersen / Scherer / *Fjordbach / *Müller | High Class Racing (DK) | | Oreca | 07 | | Gibson | LMP2 |
| 21 | Pérez Companc / Vilander / *Mann / *Nielsen | AF Corse (I) | Amato Ferrari | Ferrari | 488 | GT3 | Ferrari | GTD |
| 22 | McGuire / Owen / *Smith / *Hanson | United Autosports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 23 | Gunn / Riberas / *Martin | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD Pro |
| 24 | Yelloly / van der Linde / *Eng / *Wittmann | BMW M Team RLL (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 25 | De Phillippi / Edwards / *Farfus / *Krohn | BMW M Team RLL (USA) | | BMW | M4 | G82 GT3 | BMW | GTD Pro |
| 26 | Shields / de Wilde / *Crews / *Siegel | Muehlner Motorsports America (B) | | Duqueine | D08 | | Nissan | LMP3 |
| 27 | de Angelis / *Gamble / *James / *Turner | Heart of Racing Team (USA) | Ian James | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 28 | de Quesada / Lundqvist / *Morad / *Götz | Alegra Motorsports (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 29 | van Eerd / Murry / *Van Der Garde / *VeeKay | Racing Team Nederland (NL) | | Oreca | 07 | | Gibson | LMP2 |
| 31 | Derani / Nunez / *Conway | Whelen Engineering Racing (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 32 | Skeen / Cosmo / *McAleer / *Andrews | Gilbert Korthoff Motorsports (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 33 | Barbosa / Willsey / *Jakobsen / *Priaulx | Sean Creech Motorsport (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 34 | Washington / Bachler / *Sofronas / *Bleekemolen | GMG Racing (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 36 | Andretti / Burdon / *Lindh / *Chaves | Andretti Autosport (USA) | Michael Andretti | Ligier | JS P320 | | Nissan | LMP3 |
| 38 | Abe / Pino / *Grist / *Goldburg | Performance Tech Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 39 | Megennis / Mitchell / *Lewis / *Westphal | CarBahn with Peregrine Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD |
| 42 | Yount / Hites / *Conwright / *Palttala | NTE Sport (USA) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 44 | Potter / Lally / *Pumpelly / *Adam | Magnus Racing (USA) | John Potter | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 47 | Lacorte / Rovera / *Sernagiotto / *Fuoco | Cetilar Racing (I) | | Ferrari | 488 | GT3 | Ferrari | GTD |
| 48 | Kobayashi / Johnson / *Rockenfeller / *Lopez | Ally Cadillac (USA) | | Cadillac | DPi-V.R | | Cadillac | DPi |
| 52 | Keating / Jensen / *Huffaker / *Lapierre | PR1 Mathiasen Motorsports (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 54 | Bennett / Kurtz / Braun / Jönsson | CORE Autosport (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 57 | Ward / Auer / *Ellis / *Grenier | Winward Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 59 | Miller / Holton / *Bergstein / *Gallagher | Crucial Motorsports (USA) | | McLaren | 720S | GT3 | McLaren | GTD |
| 60 | Jarvis / Blomqvist / *Castroneves / *Pagenaud | Meyer Shank Racing W/Curb-Agajanian (USA) | Michael Shank | Acura | ARX-05 | | Acura | DPi |
| 62 | Serra / Rigon / *Pier Guidi / *Calado | Risi Competizione (USA) | | Ferrari | 488 | GT3 | Ferrari | GTD Pro |
| 63 | Caldarelli / Bortolotti / *Ineichen / *Mapelli | TR3 Racing (USA) | | Lamborghini | Huracán | GT3 Evo | Lamborghini | GTD Pro |
| 64 | Giovanis / Trinkler / *Plumb / *Plumb | TeamTGM (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |
| 66 | Simpson / Bechtolsheimer / *Miller / *Farnbacher | Gradient Racing (USA) | | Acura | NSX | GT3 | Acura | GTD |
| 68 | Heriau / Rast / *Rasmussen / *Jones | G-Drive Racing By APR (RUS) | | Oreca | 07 | | Gibson | LMP2 |
| 69 | Falb / Allen / *Ghiotto / *van der Helm | G-Drive Racing By APR (RUS) | | Oreca | 07 | | Gibson | LMP2 |
| 70 | Iribe / Millroy / *Schandorff / *Pepper | Inception Racing (GB) | | McLaren | 720S | GT3 | McLaren | GTD |
| 71 | Goikhberg / *Perera / *Llarena / *Paul | T3 Motorsport North America (D) | | Lamborghini | Huracán | GT3 | Lamborghini | GTD |
| 74 | Robinson / *Fraga / *van Berlo / *Cooper | Riley Motorsports (USA) | | Ligier | JS P320 | | Nissan | LMP3 |
| 75 | Habul / Marciello / *Schiller / *Stolz | Sun Energy 1 (AUS) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD |
| 79 | Andlauer / Picariello / *MacNeil / *Cairoli | WeatherTech Racing (USA) | | Porsche | 991 GT3 R | | Porsche | GTD Pro |
| 81 | Lux / DeFrancesco / *O'Ward / *Herta | DragonSpeed USA (USA) | | Oreca | 07 | | Gibson | LMP2 |
| 96 | Foley / Auberlen / *Dinan / *Klingmann | Turner Motorsport (USA) | | BMW | M4 | G82 GT3 | BMW | GTD |
| 97 | Engel / Gounon / *MacNeil / *Juncadella | WeatherTech Racing (USA) | | Mercedes-AMG | GT3 | | Mercedes-AMG | GTD Pro |
| 98 | Dalla Lana / Pittard / *Eastwood / *Thiim | Northwest AMR (CDN) | | Aston Martin | Vantage AMR | GT3 | Aston Martin | GTD |
| 99 | Boulle / Wilson / *Ferriol / *Legge | Team Hardpoint (USA) | | Porsche | 991 GT3 R | | Porsche | GTD |